Companies that invest in higher salaries for low-level employees find success in a competitive market.

The average American cashier makes $20,230 a year, a salary that in a single-earner household would leave a family of four living under the poverty line. But if he works the cash registers at QuikTrip, it’s an entirely different story. The convenience-store and gas-station chain offers entry-level employees an annual salary of around $40,000, plus benefits. Those high wages didn’t stop QuikTrip from prospering in a hostile economic climate. While other low-cost retailers spent the recession laying off staff and shuttering stores, QuikTrip expanded to its current 645 locations across 11 states.